right|thumb|250px|Open fruit of the [[achiote tree (Bixa orellana), showing the seeds from which annatto is extracted]]

Annatto ( or ) is an orange-red condiment and food coloring derived from the seeds of the achiote tree (Bixa orellana), native to tropical parts of the Americas. It is often used to impart a yellow to red-orange color to foods, but sometimes also for its flavor and aroma. Its scent is described as "slightly peppery with a hint of nutmeg" and its flavor as "slightly nutty, sweet, and peppery".

The color of annatto comes from various carotenoid pigments, mainly bixin and norbixin, found in the reddish waxy coating of the seeds. The condiment is typically prepared by grinding the seeds to a powder or paste. Similar effects can be obtained by extracting some of the color and flavor principles from the seeds with hot water, oil, or lard, which are then added to the food.

Annatto and its extracts are now widely used artisanally and industrially as a coloring agent in many processed food products, such as cheeses, dairy spreads, butter and margarine, custards, cakes and other baked goods, potatoes, snack foods, breakfast cereals, smoked fish, and sausages. In these uses, annatto is a natural alternative to synthetic food coloring compounds, but it has been linked to rare cases of food-related allergies. It was probably not initially used as a food additive, but for other purposes, such as ritual and decorative body painting (still an important tradition in many Brazilian native tribes, such as the Wari'), sunscreen, insect repellent, and for medical purposes. It was used for Mexican manuscript painting in the 16th century. Men of the Tsàchila tribe in Ecuador are highly recognizable thanks to their traditional bright orange hair, which is achieved by using crushed seeds of annatto. It is believed they have been doing so for centuries.

Annatto has been traditionally used as both a coloring and flavoring agent in various cuisines from Latin America, the Caribbean, the Philippines, and other countries where it was taken home by Spanish and Portuguese colonizers in the 16th century.

Culinary uses

Traditional cuisine

Ground annatto seeds, often mixed with other seeds or spices, are used in the form of paste or powder for culinary use, especially in Latin American, Jamaican, Belizean, Chamorro, Vietnamese, and Filipino cuisines. In Mexican and Belizean cuisines, it is used to make the spice recado rojo. In Venezuela, annatto is used in the preparation of hallacas, huevos pericos, and other traditional dishes. In Puerto Rico, it is often simmered in oil or ground with seasonings and herbs to make sazón or used to make pasteles, arroz con gandules, and several other dishes, where it is one of the main ingredients. Annatto paste is an important ingredient of cochinita pibil, the slow-roasted pork dish popular in Mexico. It is also a key ingredient in the drink tascalate from Chiapas, Mexico. In the Philippines, it is used for the sauce of pancit palabok. In Guam, it is used to make a staple rice dish flavored with annatto, onion, garlic, butter, and other spices.

<!-- In earlier times, the seeds of the plant were also used as a staple food in South and Central America. Today, an Inca recipe for beer made from cocoa, chilli, honey and annatto is available again. The recipe dates back to 1200 BC and was briefly marketed in North America under the trade name Dogfish Head Theobroma. In the prehistory and early history of South and Central America, the pure, soaked annatto seed was fermented with 5% honey for 10 days and sometimes used as a sole foodstuff. The continent's universities have now recognised the high nutrient content of the seed and are researching ways to reintroduce annatto as a foodstuff. However, practical solutions that would guarantee a basic food supply from the wild harvest have not yet been taken up again by the population. -->

Industrial food coloring

thumb|[[Colby cheese colored with annatto]]

Annatto is commonly used to impart a yellow or orange color to many industrialized and semi-industrialized foods, including cheese, ice cream, bakery products, desserts, fruit fillings, yogurt, butter, oils, margarines, processed cheese, and fat-based products. In the United States, annatto extract is listed as a color additive "exempt from certification" and is informally considered to be a natural coloring. Foods colored with annatto may declare the coloring in the statement of ingredients as "colored with annatto" or "annatto color". In the European Union, it is identified by the E number E160b.

Cheese

In cheese, the yellow and orange hues naturally vary throughout the year as the cow's feed changes: in the summer, with fresh grass and its natural carotene content, the milk produced would have a natural orange tint, as would the cheese made from it, while at other times of the year, the tint would be greatly reduced. As the pigment is carried in the cream, skimming the milk, which some farmers did to make butter or to sell it separately, the lesser-quality cheese from such milk would be white.

To fool the consumer, the cheesemakers introduced colorants to imitate the more intense colors of the finer summer cheese. Initially these colors came from saffron, marigold, and carrot juice, but later annatto came into use. Many cheddars are produced in both white and red (orange) varieties, the only difference between the two being the presence of annatto as a coloring. That practice has extended to many modern processed cheese products, such as American cheese and Velveeta. Cheeses from other countries also use annatto, including Mimolette from France and Leyden from the Netherlands.

Cheeses that use annatto in at least some preparations include:

Chemical composition

thumb|right|300px|[[Bixin, the major apocarotenoid of annatto]]

The yellow to orange color is produced by the chemical compounds bixin and norbixin, which are classified as carotenoids. The fat-soluble color in the crude extract is called bixin, which can then be saponified into water-soluble norbixin. This dual solubility property of annatto is rare for carotenoids. The seeds contain 4.5–5.5% pigment, which consists of 70–80% bixin. The more norbixin in an annatto preparation, the more yellow it is; a higher level of bixin gives it a more orange hue.

Safety

Annatto condiments and colorants are safe for most people when used in food amounts, but they may cause allergic reactions in those who are sensitive. In one 1978 study of 61 patients with chronic hives or angioedema, 56 patients were orally provoked by annatto extract during an elimination diet. A challenge was performed with a dose equivalent to the amount used in of butter. Twenty-six percent of the patients reacted to this color four hours after intake, worse than synthetic dyes, such as amaranth (9%), tartrazine (11%), sunset yellow FCF (17%), allura red AC (16%), ponceau 4R (15%), erythrosine (12%) and brilliant blue FCF (14%).

Annatto is not among the "Big Eight" substances causing hypersensitivity reactions which are responsible for more than 90% of food related allergic reactions. The US FDA and experts at the Food Allergy Research and Resource Program (FARRP) of the University of Nebraska do not include annatto in the list of major food allergens.

References

Further reading

  • Major Colorants and Dyestuffs Entering International Trade, Annatto Seed and Its Extracts from the UN's Food and Agriculture Organization